I come from C++ background, so by "direct support", I think he means a language construct that clearly shows the inheritance relationship, as in Java:

I come from C++ background, so by "direct support", I think he means a language construct that clearly shows the inheritance relationship, as in Java: public class MountainBike extends Bicycle or C++: class MountainBike: public Bicycle From those links, it looks like in Go, you use an anonymous struct inside a normal class. I would call it "aggregation" or "containment" (or implicit delegation), not inheritance. It suggests "has-a" relationship rather than an "is-a" relationship. The Go's "syntax" for inheritance (if you can call that) is ambiguous, unlike C++ or Java.